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Texas Instruments SN74LVC574AQPWREP
- Part No.:
- SN74LVC574AQPWREP
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC574AQPWREP.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,958
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Product details
Overview
SN74LVC574AQPWREP from Texas Instruments is an octal edge-triggered D-type flip-flop with 3-state outputs, designed for 2.0 V to 3.6 V operation, featuring 7 ns max propagation delay at 3.3 V, ±24 mA output drive, and Ioff partial-power-down support. It serves as a bus interface register in industrial control backplanes and high-speed data acquisition systems.
For engineers reviewing the SN74LVC574AQPWREP datasheet, SN74LVC574AQPWREP pinout, SN74LVC574AQPWREP application, or SN74LVC574AQPWREP equivalent, key selection criteria include its 20-pin TSSOP package, 150 MHz clock frequency capability, mixed-voltage (3.3 V/5 V) input tolerance, and guaranteed operation from –40°C to 125°C.
Technical Context
This device implements eight independent D-type latches triggered on the rising edge of CLK, with synchronous data capture and asynchronous 3-state control via OE. Its Ioff circuitry disables outputs during power-down to prevent current backflow, enabling safe hot-insertion in multi-rail systems.
Each channel supports 5.5 V-tolerant inputs while operating from a 2.0–3.6 V supply, allowing direct interfacing between 3.3 V logic domains and legacy 5 V peripherals without level shifters. Output VOH/VOL specifications are guaranteed across voltage and temperature for reliable bus driving under capacitive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 3.6 V - Enables use in low-voltage embedded systems with tight power budgets. |
| Max Clock Frequency | 150 MHz - Supports high-throughput data latching in real-time digital signal paths. |
| tpd (Max) | 7 ns at VCC = 3.3 V - Ensures minimal timing skew in synchronized register banks. |
| IOL / IOH | ±24 mA - Drives heavy capacitive buses (e.g., >50 pF) without external buffers. |
| Input Voltage Range | 0 V to 5.5 V - Allows direct connection to 5 V CMOS/TTL outputs in mixed-voltage systems. |
| Operating Temperature | –40°C to 125°C - Qualified for extended-temperature industrial and automotive under-hood applications. |
| Ioff Support | Yes - Prevents damaging back-current when VCC = 0 V, critical for hot-swap subsystems. |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 4.4 mm body, 0.65 mm pitch, exposed pad not present, RoHS-compliant NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE (Output Enable) | Active-low control for simultaneous 3-state disable of all eight Q outputs. |
| 2–9 | 1D–8D | Data inputs latched on rising CLK edge; 5.5 V tolerant regardless of VCC. |
| 10 | GND | Ground reference for logic and power; must be low-impedance for noise immunity. |
| 11 | VCC | Primary supply (2.0–3.6 V); powers internal logic and output drivers. |
| 12–19 | 1Q–8Q | Registered outputs with 3-state capability; drive bidirectional data buses directly. |
| 20 | CLK | Global clock input; rising-edge sensitive; 5.5 V tolerant; synchronizes all eight D-to-Q transfers. |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Outputs | Enables shared-bus architectures by electrically isolating outputs without pull-up resistors. |
| Mixed-Voltage Interface | Accepts 5 V inputs while powered from 3.3 V, eliminating need for discrete level translators. |
| Ioff Protection | Automatically disables outputs during power-down, preventing reverse current flow in partial-power systems. |
| High-Speed Timing | 7 ns tpd and 2 ns setup/hold times support clean sampling of fast parallel data streams. |
| Extended Temp Range | –40°C to 125°C qualification ensures reliability in harsh environments like motor drives and base stations. |
Applications
| Industrial PLC Backplane | Automotive ADAS Sensor Hub |
|---|---|
Use Scenario: Latching sensor data from multiple analog front-ends into a centralized FPGA processing unit across a 24-slot modular chassis. IC Role / Device Role / Timing Role: Octal D-flip-flop acting as synchronized input register; CLK driven by system master clock, OE controlled per slot for selective readout. Use Value: 150 MHz clock rate and 7 ns tpd enable deterministic sampling of time-critical CAN/LIN diagnostics data without pipeline stalls. | Use Scenario: Buffering raw pixel data from dual 1.2 MP image sensors before compression in a surround-view ECU. IC Role / Device Role / Timing Role: Parallel data register providing temporary storage and bus isolation between sensor interface and SoC's MIPI bridge. Use Value: ±24 mA drive strength and 50 pF load capability allow direct connection to long PCB traces without signal integrity degradation. |
| Test Equipment Digital I/O Module | Avionics Data Acquisition Unit |
Use Scenario: Capturing 8-bit status signals from DUTs under automated test sequences with precise timestamp alignment. IC Role / Device Role / Timing Role: Edge-triggered latch capturing parallel status bits on system trigger; OE used to tri-state during reconfiguration. Use Value: 2 ns setup/hold time guarantees accurate capture of sub-ns edge-aligned signals even at full rated speed. | Use Scenario: Isolating ARINC 429 receiver outputs from flight control processor buses during power sequencing events. IC Role / Device Role / Timing Role: 3-state buffer register ensuring no bus contention during cold-start initialization phases. Use Value: Ioff protection prevents backfeed from powered ARINC receivers into unpowered avionics bays, meeting DO-160 Section 22 surge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC574APWRE4 | Same functionality and pinout; commercial-grade (–40°C to 85°C), non-EP variant. | Lacks extended temperature qualification and enhanced DMS support; unsuitable for under-hood or sealed industrial enclosures. | Select only for cost-sensitive, ambient-temperature applications where EP-level reliability is unnecessary. |
| SN74LVCH16374ADGGR | 16-bit version in 48-pin TSSOP; includes bus-hold and Schmitt-trigger inputs; higher drive (±32 mA). | Double data width requires PCB redesign; added features increase complexity for simple 8-bit buffering needs. | Choose only when scaling to 16-bit buses or requiring input noise immunity in electrically noisy aircraft cabins. |
Compared with SN74LVC574APWRE4 and SN74LVCH16374ADGGR, the SN74LVC574AQPWREP uniquely balances military-grade temperature range, Ioff safety, and minimal 20-pin footprint-making it optimal for space-constrained, high-reliability embedded register applications without over-engineering.
Availability
SN74LVC574AQPWREP is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive ADAS sensor hubs, and avionics data acquisition units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for SN74LVC574AQPWREP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The SN74LVC574AQPWREP belongs to TI's enhanced plastic (EP) logic family, engineered for high-reliability operation in extended-temperature industrial and defense systems where standard commercial parts fail.
FAQ
What is the maximum clock frequency supported by the SN74LVC574AQPWREP?
The SN74LVC574AQPWREP supports a maximum clock frequency of 150 MHz across its full operating temperature range (–40°C to 125°C) and supply voltage range (2.0 V to 3.6 V). This specification is guaranteed in the official TI datasheet SCAS750A and verified under standard load conditions (CL = 50 pF). The SN74LVC574AQPWREP achieves this performance while maintaining 2 ns setup and hold times, making it suitable for high-speed synchronous data capture in real-time systems.
Does the SN74LVC574AQPWREP support 5 V input signals while operating at 3.3 V VCC?
Yes, the SN74LVC574AQPWREP accepts input voltages up to 5.5 V regardless of VCC level, enabling direct interfacing with 5 V logic families without external level shifters. This feature is explicitly specified in the "Recommended Operating Conditions" table of the TI datasheet, where VI (input voltage) is rated from 0 V to 5.5 V. The SN74LVC574AQPWREP leverages this capability to simplify mixed-voltage system design, especially in legacy equipment upgrades and sensor interface modules.
What does Ioff functionality mean for the SN74LVC574AQPWREP?
Ioff functionality in the SN74LVC574AQPWREP disables all outputs when VCC = 0 V, preventing damaging current backflow from live bus lines into the unpowered device. This is critical for hot-swap and partial-power-down systems. The Ioff circuitry is built into the silicon and requires no external components. As confirmed in the TI datasheet SCAS750A, the SN74LVC574AQPWREP meets JEDEC JESD78 standards for off-state current, ensuring robustness in modular power architectures.
Is the SN74LVC574AQPWREP pin-compatible with standard commercial versions like SN74LVC574APWRE4?
Yes, the SN74LVC574AQPWREP is pin-compatible and functionally identical to SN74LVC574APWRE4 in the same TSSOP-20 (PW) package, sharing identical pinout, electrical behavior, and timing characteristics. However, the SN74LVC574AQPWREP adds extended temperature qualification (–40°C to 125°C), enhanced DMS support, and controlled baseline manufacturing-making it suitable for mission-critical deployments where the commercial variant is insufficient.
What is the thermal resistance (θJA) of the SN74LVC574AQPWREP in its TSSOP package?
The SN74LVC574AQPWREP in the TSSOP-20 (PW) package has a junction-to-ambient thermal resistance (θJA) of 83°C/W, as specified in the "Absolute Maximum Ratings" section of the TI datasheet SCAS750A. This value assumes standard JEDEC high-K board conditions (2S2P) and is critical for thermal design in enclosed industrial enclosures. The SN74LVC574AQPWREP's low power dissipation (<10 µA ICC) minimizes self-heating, allowing reliable operation within this thermal budget even at 125°C ambient.
SN74LVC574AQPWREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 7ns @ 3.3V, 30pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Iq):
- 10 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74LVC574AQPWREP FAQ
1.How can I place an order for SN74LVC574AQPWREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC574AQPWREP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74LVC574AQPWREP reliable?
The price and inventory of SN74LVC574AQPWREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC574AQPWREP is usually 5 days.
3.What payment methods are accepted for SN74LVC574AQPWREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC574AQPWREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC574AQPWREP?
SN74LVC574AQPWREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC574AQPWREP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74LVC574AQPWREP?
For technical support, including SN74LVC574AQPWREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC574AQPWREP requirements.
6.How does Aetrix verify that SN74LVC574AQPWREP is sourced from the original manufacturer or authorized distributors?
All SN74LVC574AQPWREP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LVC574AQPWREP meets industry standards.
7.What is the process for return or replacement of SN74LVC574AQPWREP?
All SN74LVC574AQPWREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC574AQPWREP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74LVC574AQPWREP part is unused and in its original packaging.
Return procedure for SN74LVC574AQPWREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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